Ansmann Comfort Smart, Fast Charger, For up to 4 NiMH AAA or AA rechargeable batteries, Gentle charging mode or fast charging mode, Battery full detection and termination of charging process, Single slot monitoring, Capacity quick test, Battery analysis, Trickle charging by means of charging pulses, Automatic start of charging after inserting a battery with correct polarity, USB input, Includes 1m USB cable